Hybrid MHD-kinetic electron simulations of global standing modes (Invited)

Details Hybrid MHD-kinetic electron simulations of global standing modes (Invited) Hybrid MHD-kinetic electron simulations of global standing modes (Invited)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm33e..04d&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM33E-04

Physics

Plasma Physics

[2704] Magnetospheric Physics / Auroral Phenomena, [2753] Magnetospheric Physics / Numerical Modeling, [7827] Space Plasma Physics / Kinetic And Mhd Theory, [7867] Space Plasma Physics / Wave/Particle Interactions

Scientific paper

Geomagnetic Field Line Resonances (FLRs) are an example of large scale global structures that can directly couple energy from large perpendicular scale lengths to small scale kinetic Alfven wave (KAW) and inertial Alfven wave (IAW) scale lengths and ultimately in to the acceleration of particles to carry the field aligned currents. In this presentation, we will summarize the methodology and results of a hybrid MHD-kinetic electron model of FLRs which self consistently couples the cold plasma MHD equations to a system of kinetic guiding center electrons in a dipolar geometry. Results will highlight the cascade of energy evident in these simulations from large to small scale and will demonstrate that the deposition of this wave energy into electron acceleration is a significant sink of wave energy. The calculated wave spectra evident in this cascade will also be compared with observations and advances to the model using a gyrokinetic description of ion dynamics will be discussed.

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